fix: audit hash-chain GDPR, serialization, and alerting (#541-544)

[2witstudios]

Summary

• GDPR-safe hash chain ([Audit] Hash-chain GDPR fix #541): Hash computation excludes PII fields (userId, sessionId, ipAddress, userAgent, geoLocation) so the chain stays verifiable after right-to-erasure anonymization
• Advisory lock serialization ([Audit] Hash-chain serialization #542): Replaced FOR UPDATE row locking with pg_advisory_xact_lock to prevent concurrent chain forks — works even on empty tables (genesis case)
• Verification alerting ([Audit] Verification alerting #544): Added setChainAlertHandler callback and startPeriodicVerification cron scheduler that fires alerts on chain integrity failures

Test plan

• Chain verifiable after PII anonymization (4 GDPR-specific tests)
• Advisory lock acquired before hash read (3 serialization tests)
• Alert fires on broken chain, not on valid chain (14 alerting tests)
• All 70 audit tests pass across 5 test files
• Manual: verify advisory lock behavior under concurrent load
• Manual: confirm periodic verification fires at configured interval

🤖 Generated with Claude Code

[coderabbitai]

Warning

Rate limit exceeded

@2witstudios has exceeded the limit for the number of commits that can be reviewed per hour. Please wait 28 minutes and 36 seconds before requesting another review.

⌛ How to resolve this issue?

After the wait time has elapsed, a review can be triggered using the @coderabbitai review command as a PR comment. Alternatively, push new commits to this PR.

We recommend that you space out your commits to avoid hitting the rate limit.

🚦 How do rate limits work?

CodeRabbit enforces hourly rate limits for each developer per organization.

Our paid plans have higher rate limits than the trial, open-source and free plans. In all cases, we re-allow further reviews after a brief timeout.

Please see our FAQ for further information.

📥 Commits

Reviewing files that changed from the base of the PR and between afb36e6 and 9e776ae.

📒 Files selected for processing (8)

• packages/lib/src/audit/__tests__/mask-email.test.ts
• packages/lib/src/audit/__tests__/security-audit-alerting.test.ts
• packages/lib/src/audit/__tests__/security-audit-chain-verifier.test.ts
• packages/lib/src/audit/__tests__/security-audit.test.ts
• packages/lib/src/audit/index.ts
• packages/lib/src/audit/security-audit-alerting.ts
• packages/lib/src/audit/security-audit-chain-verifier.ts
• packages/lib/src/audit/security-audit.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch ppg/audit-hardening

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[chatgpt-codex-connector]

You have reached your Codex usage limits for code reviews. You can see your limits in the Codex usage dashboard.
To continue using code reviews, you can upgrade your account or add credits to your account and enable them for code reviews in your settings.